S
M
T
W
T
F
S
26
75°
57°
27
79°
54°
28
79°
57°
29
61°
55°
30
63°
54°
1
64°
52°
2
63°
52°
3
59°
44°
4
58°
43°
5
58°
42°
6
62°
42°
7
62°
45°
8
60°
47°
9
57°
46°
10
57°
46°
11
59°
47°
12
59°
47°
13
60°
48°
14
61°
48°
15
63°
47°
16
61°
46°
17
60°
47°
18
61°
47°
19
62°
48°
20
63°
47°
21
63°
48°
22
64°
48°
23
64°
49°
24
65°
48°
25
65°
49°
26
64°
49°
27
63°
50°
28
64°
49°
29
66°
51°
30
70°
54°
31
71°
56°
1
69°
56°
2
70°
55°
3
69°
54°
4
67°
53°
5
67°
52°
6
68°
53°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Porto
Porto's May 2026 forecast shows daily high temperatures ranging from 57° to 71°, with overnight lows between 42° and 56°. The average high for May is 63° with an average low of 49°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how May weather will actually feel in Porto. See also: June | July | August.
